反应详情

A mixture consisting of compound v (0.5 mmol), 2,4-thiazolidinedione (0.6 mmol) and catalytic amounts of piperidine was refluxed in EtOH (5 mL) for 24 h and then concentrated. The oily product was dissolved in ethyl acetate, poured into water and acidified with AcOH. The solution was extracted with ethyl acetate, dried and concentrated. The residue was purified by silica gel chromatography, providing compound 1 in 67% yield. 1H NMR (300 MHz, CDCl3) δ 1.04 (s, 3H), 1.46-1.56 (m, 10H), 3.69 (s, 2H), 6.78-7.28 (m, 2H), 7.08 (d, J=8.40 Hz, 1H), 7.39 (dt, J=2.10, 8.40 Hz, 1H), 7.84 (s, 1H), 8.21-8.78 (br, 1H); HRMS exact mass of (M+Na)+, 354.1140 amu; observed mass of (M+Na)+, 354.113 amu.

1. concentrationconcentrated
2. dissolutionThe oily product was dissolved in ethyl acetate
3. additionpoured into water
4. extractionThe solution was extracted with ethyl acetate
5. customdried
6. concentrationconcentrated
7. customThe residue was purified by silica gel chromatography